Professor Walter Lewin demonstrates that the period of a pendulum is independent of the mass hanging from the pendulum. This demonstration can be viewed on the video of Lecture 10. (Image courtesy of Markos Hankin, Physics Department Lecture Demonstration Group).

Friday, March 9, 2012

Space weather starts at the sun. It begins with an eruption such as a huge burst of light and radiation called a solar flare or a gigantic cloud of solar material called a coronal mass ejection (CME). The effects of those eruptions happen at Earth, or at least near-Earth space. Scientists monitor several kinds of space "weather" events -- geomagnetic storms, solar radiation storms, and radio blackouts – all caused by these immense explosions on the sun.They cause wide disruptions in Radio communications, power blackouts but for the beautiful aurora.....

Wednesday, March 7, 2012

Nasa is gearing up to have 5 consecutive launches of sounding rockets which would releasr Tri-Methyl-Aluminum higher in the sky which would be acting like tracers in the Jet Stream.
It would be tracked by the ground based cameras.
A similar experiment was done by ISRO in Jan 2010 during the annular solar eclipse.